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No. 597,218. Patented Jan. 11, 1898.

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UNITED STATES EEicE.

OLOF A. NORLUN D AND WILLIAM B. CLARK, OF CEDAR RUN, PENNSYLVANIA, ASSIGNORS OF ONE-THIRD TO GEORGE A. GAMBLE, OF SAME PLACE.

3 is a top plan view of the washer.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 597,218, dated January 1 1, 1898.

Application filed January 9, 1897. Serial No. 618,598. (No model.)

To all whom it may concern.-

Be it known that we, OL-OF A. NORLUND and WILLIAM B. CLARK, citizens of the United States, residing at Cedar Run, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Nut-Locks; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of our invention is to produce a spring-wash er nut-lock which will be secured to the face of the material through which the bolt passes by the clamping action of the nut and which securely locks the nut against rotation after it has been screwed into place upon the bolt.

In the accompanying drawings, forming a part of this specification, Figure 1 is a detail perspective view of our washer in use. Fig. 2 is a detail perspective view thereof. Fig. Fig. 4 is a bottom plan view of the same, and Fig. 5 is an edge view.

Referring to the numerals on the drawings, 1 indicates the bolt, 2 the material through which it is passed, and 3a nut of ordinary construction screwed upon the bolt and designed to be locked in place by our nut-lock.

4: indicates the nut-lock, composed of astrip of metal, preferably steel, bent in a substantially circular form and having one extremity reduced to a thin spring end 5, extending tangentially to the body of the lock, and having its extremity 6 bent in the direction substantially concentric with the lock and upwardly inclined, as at 7, and provided with a sharp cutting edge 8. The entire reduced end 5 is slightly upwardly inclined, and the opposite extremity of the washer is severed in a line parallel to the tangential end, being provided with a transverse tooth 9, extending in a direction opposite to the inclination of the reduced end.

In applying our nut-lock it is slipped upon the bolt and against the surface through which the bolt passes. The nutis then screwed in place, compressing the inclined reduced end to permit its rotation, the extremity 6 constituting a pawl which as soon as the edge of the nut is passed will spring back and engage the side of the nut with its sharp cutting edge 8, the tooth 9 being pressed into the surface of the material, and the nut-lock serving, in addition to its locking function, to constitute a spring-washer for the nut.

When it is desired to release the washer for the purpose of unscrewing the nut, a wrench is adjusted to the nut and is forced down until the inclined extremity 6 is'depresscd below the face of the nut, when, as will be ob vious, the nut may be turned and thereby unscrewed.

We do not desire to limit ourselves to the details of construction herein shown and described, but reserve to ourselves the right to change, modify, or vary such details within the scope of our invention.

Having thus described our invention, what we claim as new, an d desire to secure by Letters Patent, is

A nut-lock consisting of a strip of metal bent into a substantially circular form, and provided with a transverse tooth at one extremity and a reduced spring end extending tangentially with respect to the body of the lock, said reduced end being sprung from the plane of the look in a direction opposite that of the transverse tooth, and being provided with a knife-edged extremity substantially concentric with the body of the lock, the edge of the toothed end being inclined to facilitate the depression of the spring end which latter is designed, when the nut is screwed in place, to engage the side of said nut in a manner to prevent the rotation thereof in one direction, substantially as specified.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses.

OLOF A. NORLUND. WILLIAM B. CLARK. lVitnesses:

WILLIAM SNYDER, JOHN I-IILBORN. 

